Congcong climbed a tree and suddenly felt sticky on his hands. He found that these things were sap, so he came down from the tree quickly. Suddenly, a carnivorous dinosaur caught up from behind. He has been running. He found a dinosaur in front of him and thought he was dead. He looked at it intently and thought it was a stegosaurus. He got under stegosaurus, but the carnivorous dinosaurs were afraid to get close. After he left, he climbed out from under the stegosaurus. He found a well. Cong Cong screamed, but it turned out to be a bone. Just as he was thinking, a man came and beat him up and took him home. The man tied him to a shelf, put a lot of hay leaves under it, lit a fire and lit a fire. A group of people rushed up to bite his meat. He fainted. When he fainted, a white light flashed and he returned to his home.
About 200 million years ago, the earth was full of vast swamps, and deep valleys and hillsides were covered with dense forests. At that time, dinosaurs roamed around the world.
There are many kinds of dinosaurs, and their shapes are even more strange. Lei Long is a monster. Its body is heavier than six elephants. Every step it takes makes a loud noise like thunder. Liang Long's body is very long, more than 20 meters from beginning to end. He walks like a moving suspension bridge. Stegosaurus has two rows of triangular blades on its back and four sword-like tail spines on its tail. Triceratops has three big horns on its face, one above its nose and the other two above its eyes. Each corner is one meter long-this face is daunting to any animal.
Ichthyosaurs and pterosaurs are relatives of dinosaurs. Ichthyosaurs are very similar to dolphins today. It can dive into the water to find food. Pterosaurs have wings on both sides of their bodies. When it flies high, it looks like a light plane soaring in the sky.
Most dinosaurs ate plants, and some specialized in meat. Tyrannosaurus Rex is a very fierce carnivorous dinosaur. Its head is big, its body is short, and its teeth are like sharp daggers.
Dinosaurs laid eggs. The shell of a dinosaur egg is very hard. After the little dinosaur hatches, it will be carefully looked after by the big dinosaur until it can find its own food.
Dinosaurs have lived on the earth for more than 100 million years. About 65 million years ago, these dinosaurs suddenly disappeared mysteriously, and humans have not solved this mystery so far.
Information about Mammoths and Dinosaurs One day, Cong Cong was cooking at home. As soon as he opened the refrigerator, a hole sucked him in. When he woke up, he found himself in ancient times. Just as he was wondering, a carnivorous dinosaur threw him up and fell to the ground. He picked up many stones and threw them at the dinosaurs, but a few didn't fall to the ground.
Congcong climbed a tree and suddenly felt sticky on his hands. He found that these things were sap, so he came down from the tree quickly. Suddenly, a carnivorous dinosaur caught up from behind. He has been running. He found a dinosaur in front of him and thought he was dead. He looked at it intently and thought it was a stegosaurus. He got under stegosaurus, but the carnivorous dinosaurs were afraid to get close. After he left, he climbed out from under the stegosaurus. He found a well. Cong Cong screamed, but it turned out to be a bone. Just as he was thinking, a man came and beat him up and took him home. The man tied him to a shelf, put a lot of hay leaves under it, lit a fire and lit a fire. A group of people rushed up to bite his meat. He fainted. When he fainted, a white light flashed and he returned to his home.
4. Information about dinosaurs Dinosaurs are the general name for reptiles on the earth10.3 billion years ago. There are many kinds of them, and their size, shape and living habits are different. Land, sea and sky are all sites of dinosaurs and reptiles. As big as Mamen Xilong found in Hechuan County, Sichuan Province, China, it is 22 meters long, 3.5 meters high and weighs 40-50 tons. Usually living in a lake with a water depth of 5~ 10 meters, using the buoyancy of water to float the heavy body and feed on algae in the water. The whole body of the parrot dragon is only the size of a puppy. Some can fly in the air, such as long-tailed beak dragon, with sharp teeth and long tail. At the end of the tail, there is a membrane shaped like a fly swatter, and the flying tool is the wing membrane. Some are the overlords in the sea, such as Himalayan ichthyosaurs, which are carnivorous and good at swimming. They have long jaws and teeth in their mouths and look like dolphins today. Some warriors on land, such as Stegosaurus, were 6 meters long, with small heads and high arches on their backs. There are two rows of upright triangular bone plates with bone spurs at the tip of the tail, which are weapons against the enemy. By about10.3 billion years ago, the dinosaurs that ruled for a period of time were completely extinct on the earth due to the changes of topography and climate caused by strong crustal movement. The reason for the extinction of dinosaurs is still inconclusive, but it should be noted that the reasons are various and complicated, which is the result of the interaction between the external environment changes and the internal factors of dinosaurs at that time. dinosaur
Dinosaurs are Mesozoic reptiles, which appeared 245 million years ago and flourished 65 million years ago. Or both dinosaurs and plesiosaurs and pterosaurs. Dinosaurs suddenly disappeared in a certain period, which became a mystery in the evolution history of life on earth, and no one has solved it so far. In the past, all living things on the earth were recorded in fossils. Many dinosaur fossils have been found in Mesozoic strata. A large number of bones or various shapes can be seen in it. However, in the subsequent Cenozoic strata, there were no dinosaur fossils at all. It can be inferred that dinosaurs died out together in Mesozoic.
In fact, human beings have a long history of discovering dinosaur fossils. Before the discovery of Iguanodon, Europeans had long known that there were many grotesque huge bone fossils buried underground. It was not until Iguanodon was discovered and compared with iguana that the scientific community initially determined that Iguanodon was an extinct reptile similar to lizard 5438+0842. The British paleontologist Sir richard owen (1804- 1892) created a name for them in Latin, which consisted of two roots. The former root means "scary" and the latter root means "lizard". Since then, "scary lizard" has become a general term for a class of reptiles. We are in China. Translate this Latin name into "dinosaur". Dinosaurs are not lizards at all, although they all belong to reptiles. However, in the big family of reptiles, the kinship between dinosaurs and lizards is far from this! The archaeopteryx fossils found in 1862 are very similar to those of the macrognathus, but the difference is that the archaeopteryx fossils have obvious feathers (macrognathus also has feathers, but it is primitive), which indicates that dinosaurs and birds may be close relatives. Since 1970, many research reports have pointed out that modern birds are probably the direct descendants of theropod dinosaurs. Most scientists believe that birds are the only dinosaurs that have survived and developed to this day. However, a few scientists even think that they should be classified into the same category in biology. Crocodiles are modern close relatives of another kind of dinosaurs, but their relationship is farther than that between dinosaurs and birds. Dinosaurs, birds and crocodiles all belong to the early dinosaur evolution branch of reptiles, which first appeared in the late Permian and became the dominant fauna in the middle Triassic. In the first half of the 20th century, scientists and mass media regarded dinosaurs as slow-moving and lazy cold-blooded animals. However, the dinosaur revival movement, which began in 1970s, suggested that dinosaurs might be a group of active warm-blooded animals with social behaviors. The recently discovered evidence of the relationship between dinosaurs and birds supports the hypothesis that dinosaurs were warm-blooded animals. The oldest reptile fossils can be traced back to the Paleozoic Pennsylvanian period (3 10/00000 years ago-275 million years ago). Tracing back to the source, it evolved from amphibians. Amphibian eggs need to be in water to start developing. Reptiles evolved eggshells, which can prevent water from escaping. In this major reform, reptiles can survive without water. From 245 million years ago to the Mesozoic era 65 million years ago, reptiles became the master of the earth's ecology, so the Mesozoic era was also called the reptile era. Large reptile dinosaurs appeared in the early Mesozoic. Liang Long and Bewildebeest are herbivores, and they are the largest terrestrial animals in size and weight. Tyrannosaurus rex is the largest carnivorous dinosaur. There are also ichthyosaurs and plesiosaurs living in the sea and pterosaurs living in the air. Reptiles have multiplied on the earth for about 65.438+0.8 billion years. Among the animals of this era, dinosaurs are the most widely known. When people mention dinosaurs, they will see a huge and violent animal. In fact, there are also small and docile dinosaurs. Dinosaurs belong to vertebrate reptiles and once lived in swamps on Mesozoic land. Their hind limbs are longer than their forelimbs and have tails. Among them, many species are carnivorous and many species are herbivorous. Among them, the small ones resemble the oldest crocodiles and beaks, and the tall ones resemble birds. The study of dinosaurs is based on fossils. Paleontologists use their fossils to speculate on their shapes and habits. Some people walk on two legs; Some people walk on four legs; Some eat plants, some eat animals; Some have smooth skin, some have scales or bone plates, and more have feathers. Their similarity is that all dinosaurs had small brains (except birds and some carnivorous dinosaurs) and laid eggs on land (all dinosaurs did). A long time ago, there lived a group of strange creatures-dinosaurs. They ruled the earth and lived for nearly1.700 million years. Are derived from dinosaur fossils. Dinosaurs have lived on the earth for nearly1.700 million years. In such a long time, the earth's environment has also undergone many changes. The Pangu continent, which was originally connected as a whole, gradually drifted and split into the familiar form. After these earth plates drifted around the world, the climate environment also changed. In the early dinosaur era, the dwarf shrubs composed of ferns were the main vegetation on the earth. Plate drift and climate change have caused great changes in plant species on the earth. However, because these changes are gradually formed in a very long time, the animals growing in them can still adapt well. But in the late dinosaur era, because the climate became dry and cold, deserts appeared on the earth. Due to the drift of the earth's plates, mountains rise and valleys sink. A series of changes have taken place in the environment. [Edit this paragraph] The traditional view of dinosaur extinction: 1. It may be due to volcanic eruption caused by asteroid impact or crustal movement, climate change and food shortage. 2. It may be due to the change of the earth's surface that there are fewer plants, dinosaurs can't adapt to the change of the environment, and they can't compete for food with developing birds and mammals, and they slowly disappear from the earth. 3. Theory of species struggle. At the end of the dinosaur era, the first small mammals appeared. These animals are rodent carnivores and may feed on dinosaur eggs. Due to the lack of natural enemies, more and more small mammals finally ate dinosaur eggs. 4. Continental drift theory. Geological research has proved that there was only one continent on the earth when dinosaurs lived, and that was Pangea. Due to crustal changes, this continent split and drifted greatly in Jurassic, which eventually led to environment and drift. Dinosaurs became extinct. 5. Geomagnetic variation theory. Modern biology has proved that the death of some creatures is related to magnetic fields. When the earth's magnetic field changes, creatures sensitive to the magnetic field may become extinct. It is inferred that the extinction of dinosaurs may be related to the change of the earth's magnetic field. 6. Angiosperm poisoning theory. At the end of the dinosaur era, gymnosperms on the earth gradually became extinct and were replaced by a large number of angiosperms. These plants contain toxins not found in gymnosperms. Giant dinosaurs ate a lot, and a large number of angiosperms led to excessive accumulation of toxins in the body and finally poisoning. A new theory on the causes of dinosaur extinction: 1 plague.
6. Information about dinosaurs dinosaurs were Mesozoic reptiles, which appeared 245 million years ago and flourished 65 million years ago. Or both dinosaurs and plesiosaurs and pterosaurs. The sudden disappearance of dinosaurs at the end of Cretaceous 65 million years ago became a mystery in the evolutionary history of life on earth. This mystery has not been solved so far. In the past, all living things on the earth were recorded in fossils. Many dinosaur fossils have been found in Mesozoic strata. A large number of bones or various shapes can be seen in it. However, in the subsequent Cenozoic strata, there were no dinosaur fossils at all. It can be inferred that dinosaurs died out together in Mesozoic.
There are many kinds of dinosaurs, and their shapes and habits are quite different. Among them, the big one can be as big as dozens of elephants combined; Small, but almost like a chicken. As far as eating habits are concerned, there are tame herbivores.
And fierce meat eaters, as well as omnivorous dinosaurs who ate both vegetarian food and vegetarian food.
7. dinosaur-related information Tyrannosaurus rex recovery map overview dinosaurs lived about 235 million to 65 million years ago. They were able to walk upright on their hind legs and ruled the global terrestrial ecosystem for more than 654.38+600 million years.
Most dinosaurs have been extinct, but the descendants of dinosaurs-birds have survived and multiplied to this day. In addition, in spoken language, dinosaurs refer to ugly women.
The word "dinosaur" has two meanings in the dictionary: an ancient animal that lived hundreds of millions of years ago and is now extinct; (Internet language) A woman with bad looks in contemporary times. Biological definition and basic attributes of dinosaurs: dinosaurs were terrestrial animals that lived about 235 million to 65 million years ago and could walk upright with their hind legs. It is a diverse group of dominant vertebrates in Mesozoic. Most of them belong to terrestrial reptiles, but they can walk upright and rule the global terrestrial ecosystem for more than 654.38+0.6 billion years.
It is said that it is a vertebrate rather than a reptile, because dinosaurs were once classified as reptiles, but it does not conform to a basic feature of reptiles, the crawling way of walking, and the cold-blooded animals that have been questioned. Time of Emergence and Extinction: Dinosaurs first appeared in Triassic about 240 million years ago and died at the end of Cretaceous about 65 million years ago.
Dinosaurs finally died out in Neogene Paleocene 63 million years ago. The origin of the name "dinosaur": In fact, human beings have discovered dinosaur fossils for a long time.
Long before the discovery of Iguanodon, Europeans knew that there were many grotesque huge bone fossils buried underground. It was not until Iguanodon was discovered and compared with iguana that the scientific community initially determined that it was a group of extinct lizard-like reptiles.
1842, British paleontologist Sir richard owen (1804- 1892) created a name for them in Latin, which consists of two roots, the former meaning "terrible" and the latter meaning "lizard". Since then, "scary lizard" has become a general term for a class of reptiles.
We in China have both imagination and generalization, and translated this Latin name into "dinosaur". Dinosaurs are not lizards at all.
The relationship between dinosaurs and birds: 1862 found archaeopteryx fossils are very similar to archaeopteryx fossils, but the difference is that archaeopteryx fossils have obvious feathers (although archaeopteryx also has feathers, they are all primitive). In fact, quite a few carnivorous dinosaurs have primitive feathers, which indicates that dinosaurs and birds may be close relatives. Since 1970, many research reports have pointed out that modern birds are probably the direct descendants of theropod dinosaurs.
At present, most scientists regard birds as the only dinosaurs that have survived and developed to this day, and a few even think that they should be classified into the same category in biology (that is, dinosaurs that have not yet been built). Crocodiles are modern close relatives of another kind of dinosaurs, but their relationship is farther than that between dinosaurs and birds.
Dinosaurs, birds and crocodiles all belong to the evolutionary branch of reptiles, which first appeared in the late Permian and became the dominant fauna in the middle Triassic. From the discovery of dinosaurs to the first 60 years of the 20th century, scientists and mass media regarded dinosaurs as lazy and slow-moving cold-blooded animals due to their lack of understanding of dinosaurs.
However, since the revival of dinosaurs in 1970s, it has been suggested that dinosaurs may be active warm-blooded animals with social behaviors. Many recent evidences of the relationship between dinosaurs and birds support the view that dinosaurs were warm-blooded animals.
But what is the truth needs further study. Diversity development: From the early Jurassic to the late Cretaceous, the dinosaur family adapted to the environment and developed rapidly, which made dinosaurs develop in the direction of diversity and increased the number of dinosaur populations, giving dinosaurs an advantage and enabling them to dominate the terrestrial ecosystem of the earth.
There are many kinds of dinosaurs, and their shapes and habits are quite different. Among them, the big one can be as big as dozens of elephants combined; Small, but almost like a chicken.
As far as food habits are concerned, dinosaurs have mild vegetarians (dinosaurs that ate plants) and fierce carnivores (dinosaurs that ate animals), as well as omnivorous dinosaurs that ate both plants and plants. Habit: The oldest reptile fossils can be traced back to the "Pennsylvanian period" of Paleozoic (about 320 million years ago-280 million years ago).
Tracing back to the source, it evolved from amphibians. Amphibian eggs need to be in water to start developing.
Reptiles have evolved eggshells to prevent water from escaping from eggs. This major reform enables reptiles to survive without water.
From 245 million years ago to the Mesozoic era 65 million years ago, reptiles became the master of the earth's ecology, so the Mesozoic era was also called the reptile era. Large reptile dinosaurs appeared in the early Mesozoic.
Herbivorous Liang Long and Myxosaurus are the largest land animals in size and weight. Tyrannosaurus rex is the largest carnivore on land.
In addition, ichthyosaurs living in the sea, plesiosaurs and pterosaurs living in the air formed a complex and perfect ecosystem. Reptiles have multiplied on the earth for about 65.438+0.8 billion years.
Among the animals of this era, dinosaurs are the most widely known. When people mention dinosaurs, they will see a huge and fierce animal. In fact, there are also small and docile dinosaurs among dinosaurs.
Dinosaurs belong to vertebrate reptiles and once lived in swamps and bushes on Mesozoic land. Their hind limbs are longer than their forelimbs and have tails. Many of them are carnivores and many are herbivores.
Among them, the slower-developing species are similar to the oldest crocodiles and beaks, and the more developed species are similar to birds. Methods of studying dinosaurs: Studying dinosaurs depends entirely on fossils.
Paleontologists speculate on the shape and habits of dinosaurs through the study of dinosaur fossils. According to their research, dinosaurs are like living animals: there are big ones and small ones; Some walk on two legs, and some walk on four legs; Some eat plants, some eat animals, and some eat both animals and plants; Some have smooth skin, some have scales or bone plates, and more have feathers.
The similarity is that all dinosaurs have small brains (except birds and some carnivorous dinosaurs) and lay eggs on land (all dinosaurs do). A long time ago, a group of strange creatures lived on the earth.
8. Write a short article about dinosaurs or other ancient creatures. Brachiosaurus dinosaur body length: 23 meters long and 12 meters high. Dinosaur weight: 77-80 tons. Dinosaur's food: herbivores, eating leaves in the treetops. Age of Survival:1450,000-1560,000 years ago, the place of late Jurassic was the Grand Canyon in the United States and Tanzania in Africa. Identification: short-tailed dinosaur species: Diptera, Diptera. Calendar: Brachiosaurus means "long arm lizard". Introduction: Brachiosaurus is one of the tallest and largest dinosaurs. It has a long neck. Small head and short tail. It landed on all fours when walking. Brachiosaurus' front legs were longer than its rear legs. Each foot has five toes. One toe of each forefoot and three toes of each hind foot have claws. Brachiosaurus' teeth were straight and sharp. Brachiosaurus's nostrils grew on his head. Brachiosaurus had a small head, so it was not very clever. They live in groups and go out together. Brachiosaurus didn't make nests when it gave birth to young dinosaurs. These dinosaur eggs form a long line. Brachiosaurus didn't look after its children. When they eat, Brachiosaurus swallows all the food without chewing. Brachiosaurus is one of the biggest and heaviest dinosaurs ever. A man's head can only reach the knee of this monster. It has a huge body, a long neck, a small head and a long tail. A huge and powerful heart kept pumping blood from the neck of brachiosaurus into its cerebellum. Some scientists think it may have several hearts that send blood to all parts of its huge body. Along the cervical spine, well-developed muscles help support its head. Unlike other dinosaurs, brachiosaurus had longer front legs than rear legs, which helped it support the weight of its long neck. Brachiosaurus ate the young leaves on the treetops, which other herbivores could not reach. With its long neck, it can pick the top leaves. So do giraffes today. Brachiosaurus had a well-developed jaw, like teeth with sharp edges, which could pinch off young branches and tree buds. An elephant can eat about 1500 kg of food a day, and brachiosaurus can eat about1500 kg a day, which is ten times that of the current behemoths! It may wander in groups on the endless prairie every day, looking for fresh trees. Brachiosaurus is one of the large dinosaurs, which lived in Jurassic. You can easily see from the models of Brachiosaurus and other dinosaurs that its forelimbs were longer than its hind legs. Its shoulders are about 5.8 meters off the ground, and its head is about 12 meters off the ground when it is lifted. Although it may feed on the branches and leaves of tall trees, some scientists think it won't keep its head up for too long-this will make blood transportation very difficult. Brachiosaurus was the largest animal on land. Although dinosaurs such as Super Dragon, Super Dragon and Zhenlong have been dug up, they have not been completely dug up. So, it's not certain. Brachiosaurus, Lei Long and Liang Long all had nostrils on their heads. Such a tall animal can easily feed on the branches and leaves of tall trees. Like other giant herbivorous dinosaurs, it has a small head and a long neck, and the hump on its head is its nose. Brachiosaurus had tall forelimbs and hunched shoulders, and its whole body leaned back along the shoulders. This situation can still be seen in some tall animals such as giraffes.
9. Information about dinosaurs A dinosaur was an animal that lived about 235 million to 65 million years ago and could walk upright with its hind legs. They have ruled the global terrestrial ecosystem for more than 654.38 million+600 million years. Most dinosaurs have been extinct, but the descendants of dinosaurs-birds have survived and multiplied to this day. In addition, in spoken language, dinosaurs refer to ugly women. The word "dinosaur" has two meanings in the dictionary: an ancient animal that lived hundreds of millions of years ago and is now extinct; (Internet language) A woman with bad looks in contemporary times.
The basic nature of dinosaurs lived about 235 million to 65 million years ago, and they were able to walk upright on their hind legs, ruling the global terrestrial ecosystem for more than 654.38+600 million years. Most dinosaurs have been extinct, but the descendants of dinosaurs-birds have survived and multiplied to this day. Dinosaur English? s？ :] Bel Canto ['da? n？ ，s？ R]) lived about 200 million years ago.
dinosaur
A terrestrial animal that could walk upright with its hind legs 5 million to 65.95 million years ago is a diversified dominant vertebrate group in Mesozoic. Most of them belong to terrestrial reptiles, but they can walk upright and dominate the global terrestrial ecosystem for more than10.60 billion years. It is said that it is a vertebrate, not a reptile, because dinosaurs were once classified as reptiles, but it does not conform to one of the basic characteristics of reptiles: the crawling way of walking and the cold-blooded animals that have been questioned.
Extinction time
Dinosaurs first appeared in Triassic about 240 million years ago and died in Cretaceous about 65 million years ago. Dinosaurs eventually died out in the Cenozoic Paleocene 65 million years ago.
The origin of the name
In fact, human beings have a long history of discovering dinosaur fossils. Long before the discovery of Iguanodon, Europeans knew that there were many grotesque huge bone fossils buried underground.
It was not until Iguanodon was discovered and compared with iguana that the scientific community initially determined that it was a group of extinct lizard-like reptiles.
1842, British paleontologist Charles Owen coined the word "dinosaur". English dinosaurs come from the Greek deinos (meaning terror) Saurosc (meaning lizard or reptile). For Owen at that time, this "scary lizard" or "scary reptile" refers to an extinct large reptile (actually it is not). In fact, not many dinosaurs were found at that time. Since the discovery of dinosaurs in Antarctica in 1989, dinosaur remains have been found in seven continents all over the world. At present, there are at least 650 to 700 species (biological species) of dinosaurs described in the world. Later, scholars in China, Japan and other countries translated him into a dinosaur, because there have been legends about dragons in these countries, which think that dragons are the length of scale worms and snakes are another name for dragons.